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<H1 CLASS="western">gCAD3D basics</H1>
<P CLASS="western"><BR><BR>
</P>
<A HREF="gCAD3D_feat_en.htm">Features</A><BR><BR>
<A HREF="gCAD3D_princ_en.htm">Principles of operation</A><BR>
<P CLASS="western"><A HREF="#L1">What gCAD3D can and cannot do</A></P>
<P CLASS="western"><A HREF="#L3">Main modes VWR (viewer) / MAN
(manual text entry) / CAD (interactive graphic modelling)</A></P>
<P CLASS="western"><A HREF="gC_codes_en.htm">Codes - Formats</A> </P>
<P CLASS="western"><A HREF="#MMS">Multi-model support</A> </P>
<P CLASS="western"><A HREF="CAD_Activ_en.htm">Interactions</A> </P>
<P CLASS="western"><A HREF="AddOn_en.htm">Supplementary Programmes</A> </P>
<P CLASS="western"><A HREF="#DF">Functions for documentation</A> </P>
<P CLASS="western"><A HREF="#EG">Development History of gCAD3D</A> </P>
<P CLASS="western"><A HREF="#GC_DEL">gCAD3D uninstall</A> </P>
<P CLASS="western"><A HREF="RemoteControl_en.htm">RemoteControl</A> </P>
<P CLASS="western"><A HREF="Video_en.htm">tutorial-videos</A> </P>

<H3 CLASS="western"><BR><BR>
</H3>
<H3 CLASS="western">Basics</H3>
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<H3 CLASS="western"><A NAME="L1"></A>What gCAD3D can and cannot do</H3>
<DL>
	<DL>
		<DT CLASS="western">It can</DT></DL>
	<DD CLASS="western">
	Import and display data from Iges, Step, wire frame and solid
	objects 
	</DD><DD CLASS="western">
	Create and modify wire frame elements</DD><DD CLASS="western">
	Create surfaces</DD><DD CLASS="western">
	Create simple solid bodies</DD><DD CLASS="western">
	Assemble user-created ancillary programmes</DD><DD CLASS="western">
	Export wire frame elements as Dxf and Iges</DD><DD CLASS="western">
	Export surfaces as Vrml-1, Vrml-2, obj, tw Iges</DD><DL>
		<DT CLASS="western">
		<BR>
		</DT><DT CLASS="western">
		It cannot yet</DT></DL>
	<DD CLASS="western">
	Create or modify complex solid bodies</DD></DL>
<H4 CLASS="western">
<BR><BR>
</H4>
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<H3 CLASS="western"><A NAME="L3"></A>Main modes VWR /MAN / CAD</H3>
<DL>
	<DL>
		<DT CLASS="western">There are three main modes:</DT></DL>
	<DD CLASS="western">
	<BR>
	</DD><DD CLASS="western">
	Vwr Viewer</DD><DD CLASS="western">
	The objects are displayed and cannot be modified or deleted</DD><DD CLASS="western">
	<BR>
	</DD><DD CLASS="western">
	Man Manual</DD><DD CLASS="western">
	The object codes are displayed in an editing window, and can be
	created, modified or deleted using a text editor. The changes are
	reflected in the graphic window</DD><DD CLASS="western">
	<BR>
	</DD><DD CLASS="western" STYLE="margin-bottom: 0.5cm">
	Cad Interactive creation and modification of objects using the
	graphic window</DD></DL>
<H4 CLASS="western">
<BR><BR>
</H4>
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<H3 CLASS="western"><A NAME="MMS"></A>Multi-model support</H3>
<P CLASS="western">A model can consist of multiple models
(sub-models). A sub-model can be stored within a model (an internal
sub-model) or be imported from external data (an external sub-model)</P>
<H4 CLASS="western">Internal models</H4>
<P CLASS="western" STYLE="font-weight: medium">The model name must
not include a path (and no '/' or '\'). During the processing of
sub-models the sub-model name is cached in /tmp/Mode_ . All internal
sub-models are saved inside the model file</P>
<P CLASS="western" STYLE="font-weight: medium">Creation of sub-models</P>
<DL>
	<DD CLASS="western">sub-models/move main → new sub-model</DD><DD CLASS="western">
	Copies all objects of the active main model to a sub-model</DD><DD CLASS="western">
	sub-models/create new sub-model</DD><DD CLASS="western">
	Construct and activate a new sub-model</DD><DD CLASS="western">
	sub-models/load sub-model from file</DD><DD CLASS="western">
	Load a native model from data into a new sub-model</DD><DD CLASS="western" STYLE="margin-bottom: 0.5cm">
	<BR><BR>
	</DD></DL>
<P CLASS="western" STYLE="font-weight: medium">
Using internal sub-models in Cad mode:</P>
<DL>
	<DD CLASS="western">with the function 'M-int.Modell'</DD><DD CLASS="western">
	Select sub-models from a list (using MM middle mouse button) or by
	selecting a prepared sub-model; Define the model instance position.</DD><DD CLASS="western" STYLE="margin-bottom: 0.5cm">
	<BR><BR>
	</DD></DL>
<P CLASS="western">
Using internal sub-models in Manual mode:</P>
<DL>
	<DD CLASS="western">by keying in as</DD><DD CLASS="western" STYLE="margin-bottom: 0.5cm">
	M20=”subModell” P(0 0 0) DZ DIY</DD></DL>
<H4 CLASS="western">
External sub-models</H4>
<DL>
	<DD CLASS="western" STYLE="margin-left: 0cm">For these models an
	external model file must be given. The model name must be a symbolic
	path. The model file must be in a directory that can be referenced
	by a symbol; See symbolic file names.</DD><DD CLASS="western" STYLE="margin-left: 0cm">
	External models can only = mock-up models (ie Wrl), but cannot
	include internal or external sub-models.</DD><DD CLASS="western" STYLE="margin-left: 0cm; margin-bottom: 0.5cm">
	External sub-models are internally cached.</DD></DL>
<P CLASS="western">
Use of external sub-models in Cad mode:</P>
<DL>
	<DD CLASS="western">Use function 'M-ext.Modell'</DD><DD CLASS="western">
	Selecting sub-models from a list (middle mouse button in the
	graphics window) or by selecting existing sub-models;</DD><DD CLASS="western">
	Define the instance position</DD><DD CLASS="western" STYLE="margin-bottom: 0.5cm">
	<BR><BR>
	</DD></DL>
<P CLASS="western" STYLE="font-weight: medium">
Use of external models in Man mode:</P>
<DL>
	<DD CLASS="western">By keying In as</DD><DD CLASS="western" STYLE="margin-bottom: 0.5cm">
	M28=”Data/Mod1.gcad” P (0 0 0) DZ DIY</DD></DL>
<H4 CLASS="western">
<BR><BR>
</H4>
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<H3 CLASS="western"><A NAME="DF"></A>Functions for documentation</H3>
<DL>
	<DD CLASS="western">Representation of 2D drawings, 3D models and
	photos (bitmaps) in the same display space.</DD><DD CLASS="western">
	All images can be generated dynamically 
	</DD><DD CLASS="western" STYLE="margin-bottom: 0.5cm">
	All display objects can be combined with interactions</DD><DD CLASS="western" STYLE="margin-bottom: 0.5cm">
	<BR><BR>
	</DD><DD CLASS="western" STYLE="margin-left: 0cm; margin-bottom: 0.5cm">
	<BR><BR>
	</DD></DL>




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<PRE>

<p><a name="EG"></a></p>
<B>Development History of gCAD3D</B>

1995  The first version named xcad only for Linux and AIX.
      Graphics and User Interface with X11. 
1998  First version with the name gcad.
      Graphics with OpenGL (Mesa), with GTK user interface.
      The name corresponds to the abbreviated version of GTK CAD.
1999  gcad was renamed gCAD3D (since approximately 1998 there also
	    a gcad by Inigo Serna Robledo did exist) 
2003  New CAD engine. Ported to MS-Windows. 
2005  Step-import. 
2006  Textures. 
2007  Standard Parts (catalogue). 
2008  Script progams. 
2010  64-bit-Version Linux.
2011  neutral GUI-Interface, Gtk3-Interface
2012  Debian-packages
2013  RemoteControl, Processes.
2015  License changed to GPL-3.




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<p><a name="GC_DEL"></a></p>
<B>Uninstalling gCAD3D</B>

<b>Linux:</b>

  if gCAD3D was installed with a packetmanager (eg a debian-package)
  you should use this packetmanager for removing the program.


  Manually:
  rm -rf ~/gCAD3D
  All files are located in the directory ~/gCAD3D/

  See also <A HREF="InstNonDeb_en.htm">InstNonDeb_en.htm</A>


<B>MS-Windows:</B>

  Use ControlPanel / Software /  Remove 

  or
    Use the program UnInstall from the gCAD3D - Main Menu

  or manually:
    Delete folder (installation-directory)\gCAD3D
    gCAD3D does not use the Windows Registry
    all files are located in path (installation-directory)\gCAD3D. 
      (Installation-directory is usually C:\Program). 


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<p><a name="GC_DEL"></a></p>

</PRE>
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